CN109613708B - Local hollow four-trap system based on double-beam structure - Google Patents
Local hollow four-trap system based on double-beam structure Download PDFInfo
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- CN109613708B CN109613708B CN201910039845.4A CN201910039845A CN109613708B CN 109613708 B CN109613708 B CN 109613708B CN 201910039845 A CN201910039845 A CN 201910039845A CN 109613708 B CN109613708 B CN 109613708B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0916—Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0977—Reflective elements
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
- G21K1/06—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diffraction, refraction or reflection, e.g. monochromators
- G21K1/067—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diffraction, refraction or reflection, e.g. monochromators using surface reflection, e.g. grazing incidence mirrors, gratings
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Abstract
The invention relates to the field of applied optical technology, beam shaping and biological control, in particular to a local hollow four-well system based on a double-beam structure, which comprises a laser source, a beam shaping component, a hollow beam generating component, a light splitting component and a reflector component, wherein the laser source is arranged in the beam shaping component; the hollow beam generating assembly comprises a first biconical hollow shaping lens and a second biconical hollow shaping lens; laser emitted by the laser source is subjected to beam collimation and shaping through the beam shaping component, the laser beam incident after collimation and shaping is divided into two hollow beams through the hollow beam generating component, and the two hollow beams are divided into two beams of double hollow beams through the light splitting component and then reflected through the reflector component to form the tunable laser trap with the local hollow four-trap structure. The invention has simple structure, convenient operation and lower cost, and expands the applicability of optical capture particles.
Description
Technical Field
The invention relates to the field of applied optical technology, beam shaping and biological control, in particular to a local hollow four-well system based on a double-beam structure.
Background
There is a special category of hollow beams that attracts much attention, where there is a three-dimensional closed area in the propagation direction, where the intensity is very small or even zero, like a special closed container, called a local hollow beam (bottle beam). The local hollow light beam has many novel and unique characteristics, such as barrel-shaped light intensity distribution, spin angular momentum, orbit angular momentum, small dark spot size, no heating effect and the like. These novel physical properties make the localized hollow beam of light to play a huge potential and have a broad application prospect in laser cooling and trapping, optical tweezers, manipulation of microscopic particles (biological cells, atoms, molecules, and dielectric particles), and the like. Especially, the optical tweezers have important application in the field of modern biological science, and the local hollow beam optical tweezers have been successfully applied to the manipulation of living cells and sub-cellular level particles due to the advantages of non-contact and low damage. Therefore, how to conveniently and concisely obtain a local hollow beam with a proper size becomes a research hotspot in recent years.
The structure design of the local hollow four-trap is flexible and adjustable, so that the local hollow four-trap has diversity and applicability for trapping particles. This structure provides a very efficient and simple way to create a tunable localized air core four well. At present, the research on the local hollow four-trap light beam is less, the structure of the existing local hollow light beam tunable system is complex, and the tuning system is inconvenient to operate. Meanwhile, for particles with different sizes, different devices need to be replaced for capturing, and the cost is high.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a local hollow four-well system based on a double-beam structure, which has the advantages of simple structure, convenience in operation and lower cost, and expands the applicability of optical particle capture.
The technical scheme for solving the problems is as follows: a local hollow four-trap system based on a double-beam structure is characterized in that:
the laser beam shaping device comprises a laser source, a beam shaping assembly, a hollow beam generating assembly, a light splitting assembly and a reflector assembly;
the hollow beam generating assembly comprises a first biconical hollow shaping lens and a second biconical hollow shaping lens;
the laser source emits a first light beam and a second light beam, the first light beam and the second light beam are shaped through a light beam shaping assembly, and the shaping refers to collimation of the first light beam and the second light beam; the shaped light beam passes through the hollow light beam generating assembly, the first light beam is divided into a first hollow light beam after passing through the first biconic hollow shaping lens, and the second light beam is divided into a second hollow light beam after passing through the second biconic hollow shaping lens; first hollow light beam, the hollow light beam of second constitute two hollow light beams jointly, and two hollow light beams divide into behind the beam split subassembly: a first double hollow beam propagating in a first direction; a second double hollow beam propagating in a second direction; the first double hollow beams propagating along the first direction and the second double hollow beams propagating along the second direction are respectively reflected by the reflector component and then intersect with each other to form tunable local hollow four-trap beams.
Further, the beam shaping assembly comprises a fast axis collimating mirror and a slow axis collimating mirror.
Further, the light splitting component comprises a light splitting prism.
Further, the mirror assembly includes a first mirror and a second mirror.
Further, the first biconical hollow shaping lens and the second biconical hollow shaping lens have the same structure, the first biconical hollow shaping lens is made of F _ SILICA, the length is 1.08mm, the width is 0.54mm, the thickness is 1.15mm, the curvature radiuses of the front surface and the rear surface are-0.00001 mm and 0.00001mm respectively, and the vertex angle is 90 degrees.
Further, the laser source is a double-tube semiconductor laser.
Furthermore, the fast axis collimating mirror is made of S-TIH53, has a length of 0.75mm, a width of 0.75mm, a thickness of 1.5mm, an effective focal length of 0.91mm, a back focal length of 0.09mm and a radius of curvature of-0.88 mm.
Furthermore, the slow axis collimating mirror is made of S-TIH53, has a length of 1mm, a width of 1.5mm, a thickness of 0.55mm, an effective focal length of 2.88mm, a back focal length of 2.58mm, a pitch of 0.5mm and a curvature radius of 2.37 mm.
The invention has the advantages that:
after a laser beam passes through a beam shaping system, two double hollow beams are compounded to form a local hollow four-well beam, the size of the local hollow four-well beam can be accurately regulated and controlled by two reflectors, and then the local hollow four-well beam with the adjustable size is used for carrying out three-dimensional manipulation on particles; meanwhile, the invention has the advantages of simple structure and convenient operation.
Drawings
FIG. 1 is an overall block diagram provided in an embodiment of the present invention;
FIG. 2 is a schematic view of a beam collimation hollow shaping structure of the double-tube semiconductor laser in FIG. 1;
FIG. 3 is a schematic diagram of a beam collimation hollow shaping spot of the double-tube semiconductor laser in FIG. 1;
FIG. 4 is a block diagram of the biconic hollow shaping lens of FIG. 1;
fig. 5 is a schematic view of the tunable local area air-core four-well optical beam shown in fig. 1.
Wherein, 1-laser source; 2-fast axis collimating mirror; 3-slow axis collimating mirror; 401-a first biconical hollow shaping lens; 402-a second biconical hollow shaping lens; 5-a beam splitting prism; 6-a first mirror; 7-second mirror.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, fig. 1 is a schematic diagram of an overall structure of a dual-beam structure-based local area hollow four-well system according to an embodiment of the present invention, which includes a laser source 1, a beam shaping assembly, a hollow beam generating assembly, a beam splitting assembly, and a mirror assembly. The hollow beam growing assembly comprises a first double-cone hollow shaping lens 401 and a second double-cone hollow shaping lens 402.
The laser source 1 emits a first light beam and a second light beam, the first light beam and the second light beam are shaped by a light beam shaping component, and the shaping refers to collimation of the first light beam and the second light beam; the shaped light beam passes through the hollow light beam generating assembly, the first light beam is divided into a first hollow light beam after passing through a first biconic hollow shaping lens 401, and the second light beam is divided into a second hollow light beam after passing through a second biconic hollow shaping lens 402; first hollow light beam, the hollow light beam of second constitute two hollow light beams, and two hollow light beams divide into behind the beam split subassembly: a first double hollow beam propagating in a first direction; a second double hollow beam propagating in a second direction; the first double-hollow light beam propagating along the first direction and the first double-hollow light beam propagating along the second direction are respectively reflected by the reflector component and then intersect to form the tunable local hollow four-trap light beam.
In this embodiment, the laser source 1 is a dual-tube semiconductor laser with a wavelength of 808nm, a single die light emitting surface size of about 1 × 100um, a fast axis divergence angle of about 30 degrees (1um direction), a slow axis divergence angle of about 10 degrees (100um direction), and a die pitch of 0.5 mm. The double-tube semiconductor laser is a double-point short bar which is formed by cutting a min-bar chip and is used as a basic unit of a shaping light source.
The light splitting component is a light splitting prism 5.
In this embodiment, fig. 2 is a schematic diagram of collimation hollow shaping of an outgoing beam of a dual-tube semiconductor laser, in which a fast-axis collimating mirror is used to perform optimal collimation on a fast-axis beam, and then a slow-axis collimating mirror is used to perform optimal collimation on a slow-axis beam, so as to shape an elliptical spot into a circular spot.
In this embodiment, fig. 3 is a schematic diagram of spots after collimation and hollow shaping of an output beam of a double-tube semiconductor laser.
The parameters of the fast axis collimating mirror 2 and the slow axis collimating mirror 3 are as follows:
fast axis collimator 2: the material S-TIH53, length 0.75mm, width 0.75mm, thickness 1.5mm, effective focal length 0.91mm, back focal length 0.09mm, curvature radius-0.88 mm.
Slow axis collimator lens 3: the material S-TIH53 has the length of 1mm, the width of 1.5mm, the thickness of 0.55mm, the effective focal length of 2.88mm, the back focal length of 2.58mm, the pitch of 0.5mm and the curvature radius of 2.37 mm.
The first double-cone hollow shaping lens 401 and the second double-cone hollow shaping lens 402 have the same structure, and have a double-convex structure, and the curvature radius of the surfaces of the large cone and the small cone is consistent with the surface type.
Referring to fig. 4, the first biconical hollow shaping lens 401 is made of F _ sil ica, has a length of 1.08mm, a width of 0.54mm, a thickness of 1.15mm, a radius of curvature of the front and rear surfaces of-0.00001 mm and 0.00001mm, respectively, and a vertex angle of 90 °.
In this embodiment, as shown in fig. 5, the included angle between the two dual hollow beams is controlled by adjusting the deflection angles of the first reflecting mirror 6 and the second reflecting mirror 7, so as to redistribute the size of the local hollow beam and the stress of the optical field, thereby forming a tunable local hollow four-trap beam, which is convenient for capturing and controlling different multi-particles.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent flow transformations made by the present specification and drawings, or applied directly or indirectly to other related systems, are included in the scope of the present invention.
Claims (8)
1. A local hollow four-trap system based on a double-beam structure is characterized in that:
the laser beam shaping device comprises a laser source (1), a beam shaping assembly, a hollow beam generating assembly, a light splitting assembly and a reflector assembly;
the hollow beam growing assembly comprises a first biconical hollow shaping lens (401) and a second biconical hollow shaping lens (402);
the laser source (1) emits a first light beam and a second light beam, the first light beam and the second light beam are shaped through a light beam shaping component, and the shaping refers to collimation of the first light beam and the second light beam; the shaped light beam passes through a hollow light beam generating assembly, the first light beam is divided into a first hollow light beam after passing through a first biconic hollow shaping lens (401), and the second light beam is divided into a second hollow light beam after passing through a second biconic hollow shaping lens (402); the first double hollow beams and the second double hollow beams form double hollow beams, and the double hollow beams are divided into the following parts after passing through the light splitting component: a first double hollow beam propagating in a first direction; a second double hollow beam propagating in a second direction; the first double hollow beams propagating along the first direction and the second double hollow beams propagating along the second direction are respectively reflected by the reflector component and then intersect with each other to form tunable local hollow four-trap beams.
2. The dual-beam structure based local area hollow four-well system of claim 1, wherein: the mirror assembly comprises a first mirror (6) and a second mirror (7).
3. The dual-beam structure based local area hollow four-well system of claim 2, wherein: the light splitting component comprises a light splitting prism (5).
4. The dual-beam structure based local area air core four-well system according to any of claims 1 to 3, wherein: the beam shaping assembly comprises a fast axis collimating mirror (2) and a slow axis collimating mirror (3).
5. The dual-beam structure based local area hollow four-well system according to claim 4, wherein: the first biconical hollow shaping lens (401) and the second biconical hollow shaping lens (402) are identical in structure, the first biconical hollow shaping lens (401) is made of F _ SILICA, 1.08mm in length, 0.54mm in width and 1.15mm in thickness, the curvature radiuses of the front surface and the rear surface are-0.00001 mm and 0.00001mm respectively, and the vertex angle is 90 degrees.
6. The dual-beam structure based local area hollow four-well system according to claim 5, wherein: the fast axis collimating mirror (2) is made of S-TIH53, the length is 0.75mm, the width is 0.75mm, the thickness is 1.5mm, the effective focal length is 0.91mm, the back focal length is 0.09mm, and the curvature radius is-0.88 mm.
7. The dual-beam structure based local area hollow four-well system according to claim 6, wherein: the slow axis collimating mirror (3) is made of S-TIH53, the length is 1mm, the width is 1.5mm, the thickness is 0.55mm, the effective focal length is 2.88mm, the back focal length is 2.58mm, the pitch is 0.5mm, and the curvature radius is 2.37 mm.
8. The dual-beam structure based local area hollow four-well system of claim 7, wherein: the laser source (1) is a double-tube semiconductor laser.
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| CN201910039845.4A CN109613708B (en) | 2019-01-16 | 2019-01-16 | Local hollow four-trap system based on double-beam structure |
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| CN109946843A (en) * | 2019-05-08 | 2019-06-28 | 长春理工大学 | A kind of more local doughnut laser trap commutating optical beam systems of double V-shaped structure |
| CN110085344B (en) * | 2019-05-14 | 2020-07-03 | 长春理工大学 | Microstructure light beam regulation and control system of confocal optical laser trap |
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